文章来源:未知 文章作者:enread 发布时间:2022-09-22 09:09 字体: [ ]  进入论坛
If you prefer to go to bed and get up later – a sleep chronotype known as being a night owl1 – you may be at higher risk for type 2 diabetes2 and heart disease, a new study found.
Night owls3 were more sedentary, had lower aerobic4 fitness levels and burned less fat at rest and while active than early birds in the study. Night owls were also more likely to be insulin-resistant, meaning their muscles required more insulin to be able to get the energy they need, according to the study published Monday in the journal Experimental Physiology5.
"Insulin tells the muscles to be a sponge and absorb the glucose6 in the blood,” said senior study author Steven Malin, an associate professor in the department of kinesiology and health at Rutgers University in New Jersey7.
"Think about it like water from a water faucet8: You turn the water on and a drop touches the sponge and is immediately absorbed," Malin said. "But if you're not exercising, engaging those muscles, it's like if that sponge was to sit for a couple days and get rock hard. A drop of water isn't going to make it soft again."
If sleep chronotype is affecting how our bodies use insulin and impacting metabolism9, then being a night owl might be useful in predicting a person's risk for heart disease and type 2 diabetes, Malin added.
Sleep chronotype can have profound effects on productivity, school performance, social functioning and lifestyle habits, experts say. Early birds tend to perform better in school, and are more active throughout the day, which may partly explain why studies have found they have less risk of cardiovascular disease, Malin said.
Evening types may take more risks, use more tobacco, alcohol and caffeine, and are more likely to skip breakfast and eat more later in the day. In addition, research suggests "later cronotypes have higher body fat located more in the stomach or abdominal10 region, an area which many health professionals believe to be worse for our health," Malin said.
Researchers classified 51 adults without heart disease or diabetes into morning or evening chronotypes, based on their natural sleep and wake preferences. During the study, the participants ate a controlled diet and fasted overnight while their activity levels were monitored for a week.
The research team determined11 each person's body mass, body composition and fitness level, and measured levels of insulin sensitivity. In addition, researchers looked at how each person's metabolism obtained most of their energy, either via fat or carbohydrates12.
"Fat metabolism is important because we think if you can burn fat for energy that's going to help the muscle pick up the glucose in a more enduring fashion," Malin said.
Burning fat can promote endurance and more physical and mental activity throughout the day. Carbohydrates, on the other hand, are what the body uses for intense physical activity. Carbs are burned more quickly, which is why many athletes carb-load in advance of a race or marathon.
Results of the test showed early birds used more fat for energy at both rest and during exercise than night owls in the study, who used more carbohydrates as a source of fuel.


1 owl 7KFxk     
  • Her new glasses make her look like an owl.她的新眼镜让她看上去像只猫头鹰。
  • I'm a night owl and seldom go to bed until after midnight.我睡得很晚,经常半夜后才睡觉。
2 diabetes uPnzu     
  • In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者,医生告诫他们不要吃糖。
  • Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。
3 owls 7b4601ac7f6fe54f86669548acc46286     
n.猫头鹰( owl的名词复数 )
  • 'Clumsy fellows,'said I; 'they must still be drunk as owls.' “这些笨蛋,”我说,“他们大概还醉得像死猪一样。” 来自英汉文学 - 金银岛
  • The great majority of barn owls are reared in captivity. 大多数仓鸮都是笼养的。 来自辞典例句
4 aerobic BN8zn     
  • Aerobic exercise helps to build up stamina.有氧健身操有助于增强耐力。
  • Aerobic dance is conductive to the health.有氧舞蹈有助于健康。
5 physiology uAfyL     
  • He bought a book about physiology.他买了一本生理学方面的书。
  • He was awarded the Nobel Prize for achievements in physiology.他因生理学方面的建树而被授予诺贝尔奖。
6 glucose Fyiyz     
  • I gave him an extra dose of glucose to pep him up.我给他多注射了一剂葡萄糖以增强他的活力。
  • The doctor injected glucose into his patient's veins.医生将葡萄糖注入病人的静脉。
7 jersey Lp5zzo     
  • He wears a cotton jersey when he plays football.他穿运动衫踢足球。
  • They were dressed alike in blue jersey and knickers.他们穿着一致,都是蓝色的运动衫和灯笼短裤。
8 faucet wzFyh     
  • The faucet has developed a drip.那个水龙头已经开始滴水了。
  • She turned off the faucet and dried her hands.她关掉水龙头,把手擦干。
9 metabolism 171zC     
  • After years of dieting,Carol's metabolism was completely out of whack.经过数年的节食,卡罗尔的新陈代谢完全紊乱了。
  • All living matter undergoes a process of metabolism.生物都有新陈代谢。
10 abdominal VIUya     
  • The abdominal aorta is normally smaller than the thoracic aorta.腹主动脉一般比胸主动脉小。
  • Abdominal tissues sometimes adhere after an operation.手术之后腹部有时会出现粘连。
11 determined duszmP     
  • I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
  • He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。
12 carbohydrates 001f0186d1ea717492c413ca718f2635     
n.碳水化合物,糖类( carbohydrate的名词复数 );淀粉质或糖类食物
  • The plant uses the carbohydrates to make cellulose. 植物用碳水化合物制造纤维素。 来自《简明英汉词典》
  • All carbohydrates originate from plants. 所有的碳水化合物均来自植物。 来自辞典例句
TAG标签: disease sleep diabetes